diff --git a/lib/modules/admob/EventTypes.js b/lib/modules/admob/EventTypes.js
index 1afdd1f0..510f62e3 100644
--- a/lib/modules/admob/EventTypes.js
+++ b/lib/modules/admob/EventTypes.js
@@ -1,3 +1,6 @@
+/**
+ * @flow
+ */
 export default {
   onAdLoaded: 'onAdLoaded',
   onAdOpened: 'onAdOpened',
diff --git a/lib/modules/admob/Interstitial.js b/lib/modules/admob/Interstitial.js
index 74fcd5d2..a2f4c821 100644
--- a/lib/modules/admob/Interstitial.js
+++ b/lib/modules/admob/Interstitial.js
@@ -1,18 +1,20 @@
-import { NativeModules, Platform } from 'react-native';
+import { Platform } from 'react-native';
 import { statics } from './';
 import AdRequest from './AdRequest';
 import { SharedEventEmitter } from '../../utils/events';
+import { getNativeModule } from '../../utils/native';
 import { nativeToJSError } from '../../utils';
-
-const FirebaseAdMob = NativeModules.RNFirebaseAdMob;
+import type AdMob from './';
 
 let subscriptions = [];
 
 export default class Interstitial {
-  constructor(admob: Object, adUnit: string) {
+  _admob: AdMob;
+
+  constructor(admob: AdMob, adUnit: string) {
     // Interstitials on iOS require a new instance each time
     if (Platform.OS === 'ios') {
-      FirebaseAdMob.clearInterstitial(adUnit);
+      getNativeModule(admob).clearInterstitial(adUnit);
     }
 
     for (let i = 0, len = subscriptions.length; i < len; i++) {
@@ -20,7 +22,7 @@ export default class Interstitial {
     }
     subscriptions = [];
 
-    this.admob = admob;
+    this._admob = admob;
     this.adUnit = adUnit;
     this.loaded = false;
     SharedEventEmitter.removeAllListeners(`interstitial_${adUnit}`);
@@ -67,7 +69,10 @@ export default class Interstitial {
       adRequest = new AdRequest().addTestDevice().build();
     }
 
-    return FirebaseAdMob.interstitialLoadAd(this.adUnit, adRequest);
+    return getNativeModule(this._admob).interstitialLoadAd(
+      this.adUnit,
+      adRequest
+    );
   }
 
   /**
@@ -84,7 +89,7 @@ export default class Interstitial {
    */
   show() {
     if (this.loaded) {
-      FirebaseAdMob.interstitialShowAd(this.adUnit);
+      getNativeModule(this._admob).interstitialShowAd(this.adUnit);
     }
   }
 
diff --git a/lib/modules/admob/RewardedVideo.js b/lib/modules/admob/RewardedVideo.js
index 601e5a78..f5f6e0db 100644
--- a/lib/modules/admob/RewardedVideo.js
+++ b/lib/modules/admob/RewardedVideo.js
@@ -1,21 +1,22 @@
-import { NativeModules } from 'react-native';
 import { statics } from './';
 import AdRequest from './AdRequest';
 import { SharedEventEmitter } from '../../utils/events';
+import { getNativeModule } from '../../utils/native';
 import { nativeToJSError } from '../../utils';
-
-const FirebaseAdMob = NativeModules.RNFirebaseAdMob;
+import type AdMob from './';
 
 let subscriptions = [];
 
 export default class RewardedVideo {
-  constructor(admob: Object, adUnit: string) {
+  _admob: AdMob;
+
+  constructor(admob: AdMob, adUnit: string) {
     for (let i = 0, len = subscriptions.length; i < len; i++) {
       subscriptions[i].remove();
     }
     subscriptions = [];
 
-    this.admob = admob;
+    this._admob = admob;
     this.adUnit = adUnit;
     this.loaded = false;
     SharedEventEmitter.removeAllListeners(`rewarded_video_${adUnit}`);
@@ -62,7 +63,10 @@ export default class RewardedVideo {
       adRequest = new AdRequest().addTestDevice().build();
     }
 
-    return FirebaseAdMob.rewardedVideoLoadAd(this.adUnit, adRequest);
+    return getNativeModule(this._admob).rewardedVideoLoadAd(
+      this.adUnit,
+      adRequest
+    );
   }
 
   /**
@@ -79,7 +83,7 @@ export default class RewardedVideo {
    */
   show() {
     if (this.loaded) {
-      FirebaseAdMob.rewardedVideoShowAd(this.adUnit);
+      getNativeModule(this._admob).rewardedVideoShowAd(this.adUnit);
     }
   }
 
diff --git a/lib/modules/admob/index.js b/lib/modules/admob/index.js
index 3a43d503..691a35bb 100644
--- a/lib/modules/admob/index.js
+++ b/lib/modules/admob/index.js
@@ -61,7 +61,7 @@ export default class AdMob extends ModuleBase {
     const { adUnit } = event;
     const jsEventType = `interstitial_${adUnit}`;
 
-    if (!SharedEventEmitter.hasListeners(jsEventType)) {
+    if (SharedEventEmitter.listeners(jsEventType).length === 0) {
       // TODO
     }
 
@@ -72,7 +72,7 @@ export default class AdMob extends ModuleBase {
     const { adUnit } = event;
     const jsEventType = `rewarded_video_${adUnit}`;
 
-    if (!SharedEventEmitter.hasListeners(jsEventType)) {
+    if (SharedEventEmitter.listeners(jsEventType).length === 0) {
       // TODO
     }